fact 1.) You may have seen female an male Takashi, well hes quirk isn't swapping between genders.
Takashi has a younger sister, an the only reason i haven't posted her is because i never though of a name for Takashi's sister. you maybe questioning why I'm bring takashi's sister up? well shes the cause of the genderbending.
her quirk lets her genderbends for 24 hours but it doesn't affect herself.
Fact 2.) if takashi quirk affects people's sleeping an causes nightmares did his mother have to put up with it? No his mothers quirk is insomnia, an she is also a computer pro-gamer.
due to her quirk she has low energy but never gets sleep. (she also is otaku thats why shes an american but names her son with a Japanese name)
Fact 3.) When it comes to his whole family how come no dad, well I'm in Alaska I'm basing this off of crime rate an Alaska has a pretty big crime rate. well another fact to know Takashi's dad is in a jail in Fairbanks Alaska a correctional center.
Fact 4.) Takashi hates his quirk (idk if i mention or specified his quirk) but its an incubus like quirk an paralyzing venom hes, he can be effected by is own venom though.